Sökning: "cosmic radiation"

Visar resultat 16 - 20 av 26 uppsatser innehållade orden cosmic radiation.

  1. 16. SYSTEM ON CHIP : Fördelar i konstruktion med system on chip i förhållande till fristående FPGA och processor

    Kandidat-uppsats, Högskolan i Jönköping/JTH, Data- och elektroteknik

    Författare :Jan Ljungberg; [2015]
    Nyckelord :ARM Cortex A9; AXI3; AXI4; AXI4-Lite; Chipscope; FPGA; GP buss; interconnect; internbuss; kostnader; Modelsim; processor; System on Chip SoC ; Vivado; Xilinx; Zynq-7000;

    Sammanfattning : In this exam project the investigation has been done to determine, which profits that can be made by switching an internal bus between two chips, one FPGA and a processor, to an internal bus implemented on only one chip, System on Chip. The work is based on measurements made in real time in Xilinx’s development tools on different buses, AXI4 and AXI4-Light connected to AXI3. LÄS MER

  3. 17. Simulating the spectra of galaxies in the reionization epoch : Constraining the escape fraction of ionizing photons

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Christian Binggeli; [2015]
    Nyckelord :;

    Sammanfattning : The cosmic reionization represents a fundamental yet poorly understood phase transition in the evolution of our universe. The most promising theory is that the ionizing radiation from young hot stars in star-forming galaxies drove reionization, but much information about the number of galaxies and the escape fraction of ionizing radiation from galaxies is still missing. LÄS MER

  4. 18. The Radiological Footprint of a Be-based Neutron Source

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Författare :Sharareh Koufigar; [2015]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The radiological footprint of a Be-based neutron source embedded within the Aquarium of the Source-Testing Facility (STF) at the Division of Nuclear Physics at Lund University will soon be carefully mapped. As a precursor to this measurement program, neutron and gamma-ray energy spectra at beamport apertures have been measured using 3He and LaBr3(Ce) (cerium-activated lanthanum bromide) detectors. LÄS MER

  5. 19. CP-violation in Supernova Neutrino Oscillations

    Master-uppsats, Linköpings universitet/Teoretisk Fysik; Linköpings universitet/Tekniska högskolan

    Författare :Jessica Elevant; [2014]
    Nyckelord :CP-violation; δ-phase; neutrino oscillation; three-flavour; supernova;

    Sammanfattning : It is astonishing both how little and how much we know about neutrinos. On one hand, the neutrino is the second most abundant particle in our Universe. Neutrinos may be created in the Sun, core collapse supernovae, cosmic rays, geological background radiation, supernova remnants and in the Big Bang. LÄS MER

  7. 20. Graphical Interface for Measuring the Effect of Cosmic Radiation on Computer Memory

    Master-uppsats, Institutionen för datavetenskap

    Författare :Anders Moberg; [2013]
    Nyckelord :;

    Sammanfattning : When protons or neutrons pass through computer memory, there is a small risk that they turn a 1 into a 0, or vice versa. At flight altitudes, there is a lot of neutron and proton radiation and the risk of a bit flip is high. Therefore, computer memory needs to be tested to see what types work best in radiating environments. LÄS MER